ExtIO_RTLSDR_u8.dll with HDSDR 2.76 + dongle

Main forum to discuss RTL-SDR related topics.
qrp
Posts: 71
Joined: Wed May 22, 2019 11:16 pm

Re: ExtIO_RTLSDR_u8.dll with HDSDR 2.76 + dongle

Post by qrp » Fri Aug 09, 2019 7:10 am

richsch, When you select "Auto Q", there is no need to switch direct sampling manually. It will be automatically switch on/off when your LO frequency goes below 24 MHz. You're don't need to change anything, just change LO and direct sampling will be automatically enabled and disabled. You can forgot about this setting when "Auto Q" is selected. :)

If you want manual switch, then use:
- "Disabled" to disable direct sampling (to receive 24 - 1700 MHz)
- "Q input" to enable direct sampling on Q branch (to receive 0...24 MHz)

Just tested, all works as expected. If I don't understand your issue, please explain more details.

richsch
Posts: 10
Joined: Thu Jun 20, 2019 4:20 am

Re: ExtIO_RTLSDR_u8.dll with HDSDR 2.76 + dongle

Post by richsch » Tue Dec 03, 2019 5:54 pm

THis is a post error sorry. the next one is real
Understood...tnx for clarification
One question....just wondering why below 24 Mhz for disabling direct sampling?
rs
Last edited by richsch on Tue Dec 03, 2019 6:13 pm, edited 2 times in total.

richsch
Posts: 10
Joined: Thu Jun 20, 2019 4:20 am

Re: ExtIO_RTLSDR_u8.dll with HDSDR 2.76 + dongle

Post by richsch » Tue Dec 03, 2019 6:10 pm

qrp:
sorry if posting problem here on previous post

could you provide a link to the most recent rev for this dll? it's been a few months since last download
maybe a path to where we can get most current in the future without requiring a question like this! :)
rich

qrp
Posts: 71
Joined: Wed May 22, 2019 11:16 pm

Re: ExtIO_RTLSDR_u8.dll with HDSDR 2.76 + dongle

Post by qrp » Wed Dec 04, 2019 8:49 am

You can find the latest version (1.1.1.7) here: viewtopic.php?f=1&t=4710&start=20#p11796

it works fine, so there is nothing to change. I even don't know what feature to add :)

on1bes
Posts: 29
Joined: Sat Dec 24, 2016 11:03 pm

Re: ExtIO_RTLSDR_u8.dll with HDSDR 2.76 + dongle

Post by on1bes » Sat Aug 29, 2020 4:08 pm

I switched to HDSDR ver_2.80 because the normal EXtIO_2832 was no longer work after update Win 10 to v2004. I find the EXtIO_rtlsdr_U8 and this works in HDSDR. until now.

bansalrehana
Posts: 1
Joined: Sun Sep 27, 2020 6:15 pm

Re: ExtIO_RTLSDR_u8.dll with HDSDR 2.76 + dongle

Post by bansalrehana » Sun Sep 27, 2020 6:49 pm

I am noticing that it looks like the noise floor has moved up almost 30db compared to normal levels using the RTL2832 extio. This for either HF direct sampling setting Q or I, and RTL AGC not selected and Tuner Gain at min when direct sampling is disabled. 2.4 G sample rate

qrp
Posts: 71
Joined: Wed May 22, 2019 11:16 pm

Re: ExtIO_RTLSDR_u8.dll with HDSDR 2.76 + dongle

Post by qrp » Wed Oct 07, 2020 3:18 am

bansalrehana wrote:
Sun Sep 27, 2020 6:49 pm
I am noticing that it looks like the noise floor has moved up almost 30db compared to normal levels using the RTL2832 extio.
Noise floor is exactly the same. The difference is because this extio uses 32 bit sample format instead of 8 bit which is used in standard extio. Since it uses different sample size, HDSDR expects different dynamic range. So, it make some vertical shift.

Just recalibrate S-meter in HDSDR and noise floor will be exactly the same. You can do it in the menu Options=>Calibration Settings => S-meter Calibration

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